Keyboard switch

Details Keyboard switch Keyboard switch

1992-06-15

1994-04-26

Barrett, Glenn J.

Electricity: circuit makers and breakers

Solid contact

Membrane type

200345, 200 5A, H01H 110

Patent

active

053068866

ABSTRACT:
A keyboard switch has a deformable membrane which, when deformed, enables electrical contact between a pair of contacts. A key stem is urged away from the deformable membrane by an elastic body. When the key stem is displaced sufficiently, the elastic body imparts a click feel. The key stem, when displaced a sufficient amount, deforms the deformable membrane to make the electrical contact.

REFERENCES:
patent: 4417294 (1983-11-01), Herron
patent: 4515999 (1985-05-01), Harper
patent: 4827243 (1989-05-01), Chang
patent: 4920237 (1990-04-01), Eardley et al.
patent: 4927990 (1990-05-01), Aoki et al.
patent: 5120923 (1992-06-01), Kato et al.
patent: 5145058 (1992-09-01), Lee

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